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Finding the Fourth Proportional to 186,108.75, 278,940.78 and 67,715.64

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Solution

The fourth proportional to 186,108.75, 278,940.78 and 67,715.64 is: 101,492.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,108.75 : 278,940.78 = 67,715.64 : x
  2. Step 2: Convert to fraction form
    186,108.75/278,940.78 = 67,715.64/x
  3. Step 3: Cross multiply
    186,108.75x = 278,940.78 × 67,715.64
  4. Step 4: Simplify right side
    186,108.75x = 18,888,653,439.80
  5. Step 5: Solve for x
    x = 18,888,653,439.80/186,108.75
  6. Step 6: Final answer
    x = 101,492.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.